Composite external filter

Abstract

The utility model discloses a composite external filter, relates to filter field, including filter bottom case, bottom case casing and top case casing, the top surface of filter bottom case is fixedly connected with filter top case through fixed screw, the bottom surface of bottom case casing is equipped with bottom slope plate, one end of bottom case casing is equipped with through pipe tip A, and the other end of bottom case casing is equipped with through pipe tip B; a through pipe end A is arranged at one end of the bottom shell body, a through pipe end B is arranged at the other end of the bottom shell body, reinforcing ribs are arranged on the outer wall of the through pipe end A and the outer wall of the through pipe end B, and built-in through holes are formed in the through pipe end A and the through pipe end B. The bottom shell can be conveniently connected with a sampling pipe in a pipe network in an inserted mode, an additional pipeline connector is not needed, and therefore installation cost is reduced. The filter assembly can be easily replaced without dismounting the filter from a pipe network, so that the maintenance operation process is simplified, and as many as four filters can be mounted in the pipe network of the multi-pipeline detector side by side.

Description

Technical Field

[0001] The utility model relates to the field of filters, in particular to a composite external filter. Background Art

[0002] In atmospheric monitoring, all liquid or solid particles with a particle size less than 100um are called total suspended particulate matter, because dust, moisture, oil, etc. in the airflow may damage the equipment and affect its normal operation over a long period of time, and it is impossible to effectively remove impurities and extend the life of the equipment.

[0003] Traditional external filters generally do not have indicator arrows on their covers, making it difficult to guide installation. When the airflow enters the filter cavity, the filter components fixed in the filter cannot be fully in contact with the airflow at a specific angle, and cannot ensure that the air contact area is maximized at a certain airflow speed. The service life of the filter cannot be effectively extended. Other external filtering solutions on the market are relatively simple and cannot provide excellent working performance while extending the life of the detector and reducing maintenance frequency.

[0004] Therefore, those skilled in the art provide a composite external filter to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the utility model is to provide a composite external filter to solve the problem that the traditional external filter mentioned in the above background technology generally has no indicator arrow on the cover, which cannot be easily guided for installation. When the airflow enters the filter cavity, the filter component fixed in the filter at a specific angle cannot be fully in contact with the airflow, and it cannot ensure that the contact area between the air and the filter is maximized at a certain airflow speed, and the service life of the filter cannot be effectively extended. Other external filtering solutions on the market are relatively simple and cannot provide excellent working performance while extending the life of the detector and reducing the maintenance frequency.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A composite external filter comprises a filter bottom shell, a bottom shell shell and a top shell shell, the top surface of the filter bottom shell is fixedly connected to the filter top shell by fixing screws, the bottom surface of the bottom shell shell is provided with a bottom slope plate, one end of the bottom shell shell is provided with a through pipe end A, the other end of the bottom shell shell is provided with a through pipe end B, the outer walls of the through pipe end A and the through pipe end B are provided with reinforcing ribs, the through pipe end A and the through pipe end B are provided with built-in through holes, the bottom shell shell is provided with a bottom shell inner cavity, the bottom shell inner cavity is provided with an isolation plate A and an isolation plate B, a flow filtering pipe A is formed between the isolation plates A and B, the top surface of the top shell shell is provided with a filtering direction sign and an information sign, the top shell shell has internal isolation plates C and isolation plates D, a flow filtering pipe B is formed between the isolation plates C and D, one end of the top shell shell is provided with a screw connection sleeve A, and the other end of the top shell shell is provided with a screw connection sleeve B.

[0008] As a preferred embodiment of the utility model: the outer walls of the through pipe end A and the through pipe end B are both provided with a plurality of reinforcing ribs, and the top surfaces of the through pipe end A and the through pipe end B are provided with screw mounting bases.

[0009] As a preferred embodiment of the present invention: the isolation plates A and B are arranged in parallel, the isolation plates C and D are arranged in parallel, and the isolation plates A and B and the isolation plates C and D are matched with each other.

[0010] As a preferred embodiment of the present invention: the circulation filter pipe A and the circulation filter pipe B are both provided with a plurality of layers of filter screens inside, and the filter screens are arranged in parallel.

[0011] As a preferred embodiment of the present invention: the filter bottom shell includes a bottom shell body, a through pipe end A, a through pipe end B, a bottom shell inner cavity, an isolation plate A, an isolation plate B, a flow filter pipe A, a built-in through hole, a reinforcing rib and a bottom slope plate.

[0012] As a preferred embodiment of the present utility model: the filter top shell includes a top shell body, a filtering direction sign, an information sign, a partition plate C, a partition plate D, a flow filtering pipeline B, a screw connection shell A and a screw connection shell B.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model discloses a composite external filter, which can effectively filter dust particles <10um. The dust particles are suspended in the atmosphere for a long time without settling, which reduces atmospheric visibility, participates in atmospheric chemical reactions, and increases the degree of pollution, so that the normal operation of the aspirating smoke detector is not disturbed and challenged by the external environment, and thus does not affect the life of the detector and bring the risk of false alarms. It is used in highly polluted environments, prolongs the life of the detector, reduces the frequency of maintenance, and thus reduces the overall cost. No additional pipe joints are required, which reduces the installation cost. It can be installed vertically or horizontally. The installation is suitable for standard pipes with an outer diameter of 25mm. No pipe connection accessories are required. The three-stage filtration technology is used to ensure the maximum removal of wet and dry dust. The main air extraction speed is 0.7m / s. The filter membrane has a retention efficiency of 99.7% for 0.1um and 0.3um particles. It can filter wet particles, oil stains, and solid dust particles. The shell adopts a sealing device, and the filter element has high-efficiency anti-corrosion performance. The air inlet and outlet of the external filter are conical, which can be easily connected to the sampling pipe in the pipe network without the need for additional pipe joints, thereby reducing the installation cost. The filter assembly can be easily replaced without removing the filter from the pipe network, thereby simplifying the maintenance operation process, and up to four filters can be installed side by side in the pipe network of the multi-pipe detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of a composite external filter;

[0017] Figure 2 It is a schematic structural diagram of an isometric side view of the whole of a composite external filter;

[0018] Figure 3 It is a schematic diagram of the structure inside the filter bottom shell of a composite external filter;

[0019] Figure 4 The figure is a schematic diagram of the structure inside the filter top shell in a composite external filter.

[0020] In the figure: 1. filter bottom shell; 101. bottom shell shell; 102. through pipe terminal A; 103. through pipe terminal B; 104. bottom shell inner cavity; 105. isolation plate A; 106. isolation plate B; 107. circulation filter pipe A; 108. built-in through hole; 109. reinforcing rib; 110. bottom slope plate; 2. filter top shell; 201. top shell shell; 202. filtering direction sign; 203. information sign; 204. isolation plate C; 205. isolation plate D; 206. circulation filter pipe B; 207. screw connection shell A; 208. screw connection shell B; 3. fixing screws. DETAILED DESCRIPTION

[0021] See also Figure 1-4In the embodiment of the utility model, a composite external filter comprises a filter bottom shell 1, a bottom shell shell 101 and a top shell shell 201. The top surface of the filter bottom shell 1 is fixedly connected to the filter top shell 2 by fixing screws 3. The composite filter can effectively filter dust particles <10um. The dust particles are suspended in the atmosphere for a long time without settling, reducing atmospheric visibility, participating in atmospheric chemical reactions, and increasing the degree of pollution, so that the normal operation of the aspirating smoke detector is not disturbed and challenged by the external environment, and thus does not affect the life of the detector and bring the risk of false alarms. It is used in highly polluted environments, and prolongs the life of the detector, reduces the frequency of maintenance, and thus reduces the overall cost. No additional pipe joints are required, which reduces the installation cost. It can be installed vertically or horizontally and is suitable for standard pipes with an outer diameter of 25 mm. No pipe connection accessories are required. A bottom slope plate 110 is provided on the bottom surface of the bottom shell 101, a through pipe terminal A102 is provided at one end of the bottom shell 101, and a through pipe terminal B103 is provided at the other end of the bottom shell 101. The outer walls of the through pipe terminals A102 and B103 are provided with reinforcing ribs 109. The through pipe terminals A102 and B103 are provided with reinforcing ribs 109. The pipe end B103 is provided with a built-in through hole 108, the bottom shell housing 101 is provided with a bottom shell cavity 104, the bottom shell cavity 104 is provided with an isolation plate A105 and an isolation plate B106, and a flow filter pipe A107 is formed between the isolation plates A105 and B106. When in use, the bottom shell housing 101 is sleeved onto the top shell housing 201, and then the isolation plates A105 and B106 are matched with the isolation plates C204 and D205, and a new flow filter pipe A107 is formed between the flow filter pipe B206. The circulation filter duct A107 and the circulation filter duct B206 have filter screens inside which can filter wet particles, oil stains and solid dust particles. The top surface of the top shell body 201 is provided with a filter direction sign 202 and an information sign 203. The top shell body 201 has internal isolation plates C204 and D205, and a circulation filter duct B206 is formed between the isolation plates C204 and D205. One end of the top shell body 201 is provided with a screw connection sleeve A207, and the other end of the top shell body 201 is provided with a screw connection sleeve B208.

[0022] See also Figure 1 , Figure 3 and Figure 4The outer walls of the through-tube end caps A102 and B103 are both provided with a plurality of reinforcing ribs 109, and the top surfaces of the through-tube end caps A102 and B103 are provided with screw mounting bases. The screw connection housing A207 and the screw connection housing B208 are connected with the screw mounting base of the through-tube end A102 and the through-tube end B103, and the sealing and fixing are achieved by the fixing screws 3. The built-in through holes 108 inside the through-tube end A102 and the through-tube end B103 can facilitate the circulation of liquid. The three-stage filtration technology is adopted to ensure the maximum removal of wet and dry dust. The main air extraction speed is 0.7m / s, and the filter membrane has a retention efficiency of 99.7% for 0.1um and 0.3um particles. The isolation plates A105 and B106 are arranged in parallel, and the isolation plates C204 and D205 are arranged in parallel, and the isolation plates A105 and B106 are matched with the isolation plates C204 and D205. Several layers of filter screens are arranged inside the circulation filter pipe A107 and the circulation filter pipe B206, and the filter screens are arranged in parallel. It can filter wet particles, oil stains, and solid dust particles. The shell adopts a sealing device, and the filter element has high-efficiency anti-corrosion performance. The air inlet and outlet of the external filter are conical, which can be easily connected to the sampling pipe in the pipe network without the need for additional pipe joints, thereby reducing the installation cost. The filter assembly can be easily replaced without removing the filter from the pipe network, thereby simplifying the maintenance operation process and enabling up to four filters to be installed side by side in the pipe network of a multi-pipe detector. The filter bottom shell 1 includes a bottom shell shell 101, a through pipe end A102, a through pipe end B103, a bottom shell inner cavity 104, an isolation plate A105, an isolation plate B106, a flow filter pipe A107, a built-in through hole 108, a reinforcing rib 109, and a bottom ramp plate 110. The filter top shell 2 includes a top shell body 201, a filtering direction sign 202, an information sign 203, an isolation plate C204, an isolation plate D205, a flow filtering pipe B206, a screw connection shell A207 and a screw connection shell B208.

[0023] It should be noted that the utility model is a composite external filter, including 1. filter bottom shell; 101. bottom shell shell; 102. through pipe end A; 103. through pipe end B; 104. bottom shell inner cavity; 105. isolation plate A; 106. isolation plate B; 107. circulation and filtering pipeline A; 108. built-in through hole; 109. reinforcing ribs; 110. bottom slope plate; 2. filter top shell; 201. top shell shell; 202. filtering direction sign; 203. information sign; 204. isolation plate C; 205. isolation plate D; 206. circulation and filtering pipeline B; 207. screw connection sleeve A; 208. screw connection sleeve B; 3. fixing screws. All parts are universal standard parts or parts known to technicians in this field, and their structures and principles can be known to technicians in this field through technical manuals or through conventional experimental methods.

[0024] The working principle of the utility model is: the composite filter can effectively filter dust particles <10um. The dust particles are suspended in the atmosphere for a long time without settling, reducing atmospheric visibility, participating in atmospheric chemical reactions, and increasing the degree of pollution, so that the normal operation of the aspirating smoke detector is not disturbed or challenged by the external environment, and thus does not affect the life of the detector and bring the risk of false alarms. It is used in highly polluted environments, and prolongs the life of the detector, reduces the frequency of maintenance, and thus reduces the overall cost. No additional pipe joints are required, which reduces the installation cost. It can be installed vertically or horizontally and is suitable for standard pipes with an outer diameter of 25mm. No pipe connection accessories are required. When in use, the bottom shell 101 is sleeved onto the top shell 201, and then the isolation plate A105 and the isolation plate B106 are matched with the isolation plate C204 and the isolation plate D205. A new circulation filtration pipe is formed between the circulation filtration pipe A107 and the circulation filtration pipe B206, and the circulation The filter screen inside the filter pipe A107 and the circulation filter pipe B206 can filter wet particles, oil stains and solid dust particles, and then the screw connection shell A207 and the screw connection shell B208 are connected together with the screw mounting base of the through pipe end A102 and the through pipe end B103, and the sealing and fixing are achieved by the fixing screws 3. The built-in through holes 108 inside the through pipe ends A102 and B103 can facilitate the circulation of liquid. The three-stage filtration technology is adopted to ensure the maximum removal of wet and dry dust. The main exhaust speed is 0.7m / s, and the filter membrane has a retention efficiency of 99.7% for 0.1um and 0.3um particles, which can filter wet particles, oil stains and solid dust particles. The shell adopts a sealing device, and the filter element has high-efficiency corrosion resistance. The air inlet and air outlet of the external filter are conical, which can be conveniently connected to the sampling pipe in the pipe network without the need for additional pipe joints, thereby reducing the installation cost. Maintenance operations are simplified by easily replacing the filter assembly without removing it from the pipe network, and up to four filters can be installed side by side in the pipe network of a multi-pipe detector.

[0025] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A composite external filter, comprising a filter bottom shell (1), a bottom shell body (101) and a top shell body (201), characterized in that: The top surface of the filter bottom shell (1) is fixedly connected to the filter top shell (2) by means of fixing screws (3); the bottom surface of the bottom shell body (101) is provided with a bottom slope plate (110); one end of the bottom shell body (101) is provided with a through pipe end A (102); the other end of the bottom shell body (101) is provided with a through pipe end B (103); the outer walls of the through pipe end A (102) and the through pipe end B (103) are provided with reinforcing ribs (109); the through pipe end A (102) and the through pipe end B (103) are provided with built-in through holes (108); the bottom shell body (101) is provided with a bottom shell inner cavity (104); the bottom shell inner cavity (104) is provided with a There are an isolation plate A (105) and an isolation plate B (106), a circulation filtering duct A (107) is formed between the isolation plate A (105) and the isolation plate B (106), the top surface of the top shell body (201) is provided with a filtering direction sign (202) and an information sign (203), the top shell body (201) has an internal isolation plate C (204) and an isolation plate D (205), a circulation filtering duct B (206) is formed between the isolation plate C (204) and the isolation plate D (205), one end of the top shell body (201) is provided with a screw connection sleeve A (207), and the other end of the top shell body (201) is provided with a screw connection sleeve B (208).

2. A composite external filter according to claim 1, characterized in that: The outer walls of the through-tube end head A (102) and the through-tube end head B (103) are both provided with a plurality of reinforcing ribs (109), and the top surfaces of the through-tube end head A (102) and the through-tube end head B (103) are provided with screw mounting bases.

3. A composite external filter according to claim 1, characterized in that: The isolation plates A (105) and B (106) are arranged in parallel, the isolation plates C (204) and D (205) are arranged in parallel, and the isolation plates A (105) and B (106) and the isolation plates C (204) and D (205) are mutually matched.

4. A composite external filter according to claim 1, characterized in that: The circulation filtering pipe A (107) and the circulation filtering pipe B (206) are both provided with a plurality of layers of filtering screens, and the filtering screens are arranged in parallel.

5. A composite external filter according to claim 1, characterized in that: The filter bottom shell (1) comprises a bottom shell body (101), a through-tube end head A (102), a through-tube end head B (103), a bottom shell inner cavity (104), an isolation plate A (105), an isolation plate B (106), a flow filtering pipeline A (107), a built-in through hole (108), a reinforcing rib (109) and a bottom slope plate (110).

6. A composite external filter according to claim 1, characterized in that: The filter top shell (2) comprises a top shell body (201), a filtering direction sign (202), an information sign (203), an isolation plate C (204), an isolation plate D (205), a circulating filtering pipe B (206), a screw connection shell A (207) and a screw connection shell B (208).

Images